Rotary motor and pump.



J. B. VERNON.

ROTARY MOTOR AND PUMP.

APPLICATION FILED JULY 10, 1912.

1,082, 1 83, Patented Dec. 23, 1913.

2 SHEETSSHEET 1.

WITNESSES INVENTOR J. B. VERNON.

ROTARY MOTOR AND PUMP.

APPLICATION FILED JULY 10, 1912.

,O82,183, Patented Dec. 23, 1913.

2 SHEETSSHEET 2.

WITNESS-ES mvcm-on fl/W W W1 m 1W4;

UNITED STATES PATENT OFFICE.

J'AMES B. VERNON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO LEE S. SMITH& SON COMPANY, OF PITTSBURGH, PENNSYLVANIA, A COPARTNERSHIP.

ROTARY MOTOR -AND PUMP.

Specification of Letters Patent.

Patented Dec. 23, 1913.

Application filed July 10, 1912. Serial No. 708,707.

To all whom it may oonoerh Be it knownthat I, JAMES B. VERNON, aresident of Pittsburgh, in the ,county of Allegheny and State ofPennsylvania, have invented a new and'usefullmprovement in Rotary Motorsand Pumps, of which the following is a specification.

This invention relates tor and pump.

The object of the invention is to produce an arrangement of motor andpump, mounted upon a common base, in which vibration is reduced to aminimum and the heat produced in operation of the pump will not betransmitted to the motor and will not affect the same. I

Further objects of the invention are to provide a connection between themotor and the pump which will obviate the necessity of exact alinementtherebetween, and to imto a combined moprove generally the constructionof the motor.

The invention comprises the construction and arrangement of partshereinafter described and claimed.

In the drawings Figure 1 is a side elevation, partly in section, of amotor and pump embodying the invention; Fig. .2 is ahorizontal sectionthereof on the line 2-2, Fig.

1; Fig. 3 is an end view of the motor with one end head removed andshowing its interior-parts; Fig. 4 is an enlarged detail view of theconnection between the motor and pump; Fig. 5. is an end view from theleft in Fig. 1, the base being omitted; and Fig. 6 is a cross section onthe line 66, Fig. 1.

The motor and pump illustrated 1n the drawings are mounted upon andsuitably secured to a common base 1, having three or more horizontallyspreading legs, so arranged as to steadily and firmly support the motorand pump. In the embodiment shown, the motor is contained within acylindrical shell or casing 2, the lower portion of which is slightlyflattened, as at 3, to fit the upper surface of a boss or pro ect1on 4on the base 1 to which the casing is secured by ordinary screws or bolts5. At the pump end the shell or casing 2 is formed-with an integral orrigid head 6 provided with circumferentially spaced bosses 7, threebeing shown, which are threaded to receive longitudinally extending rodsor bars 8 which support the pump at their other ends. The

he'ad'6of the shell or casing 2 is also provided w1th a number ofcircumferentially spaced apertures 9 to permit a free flow of orprojection 10 carrying a suitable bearing 11 for supporting the motorshaft 12.

Secured to the free ends of the rods or bars 8 is a circular plate orhead 15, vided with apertures alined with the rods or bars and throughwhich screws or bolts 16 are passed thereinto. The pump casing 20 issuitably secured to the head or plate 15, as by screws or bolts 21. Thispump specifi cally forms no part of my invention and may be of anysuitable type. It is preferred, however, to use a pump of the type shownin the patent granted February 20, 1912, to myself and George .DeCamp,No. 1,018,221 and which is of the rotary piston type. Briefly described,it embodies a shaft 25 on which is formed, or to which is secured, apiston 26 mounted to rotate in an eccentric chamber 27 and provided withradially movable blades or vanes 28 which sweep around the chamber andforce theair through the pump: The pump is provided at one end withsuitable inlet and outlet connections, marked 29 and 30 respectively,communicating with the chamber 27 At its other end the shell or casing 2is provided with a removable head 35 which is generally of circular,form and is secured to the shell in a manner to be described more indetail hereinafter. Integral with the head 35 is a bearing member 36formed with a central bore to receive a bearing 37 and spaced awayfromlthe head 35 by arms 38.

The motor shown in the drawings is of the alternating current inductiontype and embodies a stator 40 and a rotor 41, the shaft 12 of the rotor41 being mounted in the bearings 37 and 11. Suitable grease cups 42 and43 are screwed into the under sides of the bosses 10' and 36 tolubricate the bearings of themotor shaft. v

The stator 40 of the motor is of the twopole type and embodies alaminated field 45 which has an approximately cylindrical outer surfaceto fit the interior wall of the casing 2 and is provided with theoppositely disposed poles 46 around which are wound the field coils 47,these being contained withimthe interior of the field. To support thefield 45 within the motor casing and to also secure the head 35 thereto,the several laminations of the field are provided with alined bores 48through which extend rods 49 which are threaded at their ends intointernal bosses 50 on the forward head 6 of the motor casing. The outerends of the rods 49 are threaded to receive screws 51 which pass throughthe head 35 and into the rods. By screwing the rods 19 through the bores48 and into the bosses 5O and then securing the head 35 to the rods, thestator 40 is securely heldin place within the casing and the head 35 isremovably secured thereto.

The rotor 41 is of ordinary type and embodies a revolving laminatedfield 55 and windings 56 and forms the secondary of the motor. At oneend it is provided with the usual commutator 57, the segments of whichare connected to the various windings of the rotor.

The present type of motor is so arranged as to have all of itsadjustable elements and those parts which may need repair or replacementon the outside of the casing and where they will be easily accessible.The commutator 57 of the motor is embraced by the arms 38 of the head 35and projects beyond the head 35, as will be apparent from Fig. 1 of thedrawings. The brushes 60 are mounted upon an insulating ring 61 whichsurrounds the arms 38 and lies close to the outer face of the head 35.This ring 61 may be formed of any suitable insulating material, asfiber, hard rubber or the like. Its interior surface snugly fits theouter surface of the arms 38 and it is held in place thereon by smallangle members 62 secured to the arms 38, as by screws 63, and providedwith upturned ends 64: resting against the outer face of the ring 61.The ring 61 is rotatable on the arms 38 and is intended to befrictionally held in position in such manner as to adjustably supportthe brushes 60 in order that the lag or slip of the motor may be variedor regulated exactly from the exterior of the casing of the motor.

The brushes 60 are of simple construction and embody metallic tubes 65,formed of copper, brass or the like, closed at their outer ends and inwhich are mounted spiral compression springs 66 which, at their forwardends bear against and force the carbon contact members 67 into contactwith the commutator 57 of the motor. The tubes 66 of the brushes 60 areheld in half round grooves 68 in the fiber ring 61 by plates or.

ends are secured' under the contact screws 70. The openings 72, inaddition to permitting the leads 71 to be brought to the exterior of thecasing, assist in permitting ventilating of the casing to cool. themotor.

In one side and near the base 1, the shell 2 is provided with anaperture 73, through which the leads 74 from the exterior circuit fordriving the motor pass to the field coils of the stator 40.

To minimize vibration and avoid the bad efi'ects of misalinement betweenthe shaft 12 of the motor and the shaft 25 of the pump, a looseconnection is provided therebetween. The pump end of the shaft 12 isprovided with a disk 75 having a boss 76 into which is threaded a screw77 to engage 'a flattened portion of the shaft for securing the diskthereon. A similar disk 78, provided with a boss 79, is similarlysecured to the pump shaft 25. The disks 75 and 78 are each provided ontheir meeting faces with longitudinally extending pins 80,circumferentially spaced about the shaft. Any numbdr of such pins may beused on either part. Between the disks 75 and 78 is mounted a washer 81formed of leather, rubber, fiber or any other slightly yielding materialand provided with a number of circumferentially spaced apertures throughwhich the pins 80 on the disks 75 and 78 project. The connectiondescribed permits of positive rotation of the shaft-25 from the shaft 12through the washer 81, and at the same time permits slight longitudinaland lateral play between these members. With the connection described itis unnecessary to secure the motor casing 20 to the shell or casing 2with. the shaft 25 in exact alinement with the shaft 12, thus obviatingextremely accurate machining. It is suflicient if these two shafts arebrought into approximate alinement, as the connect-ion described willtake up any variation therein. The connection at the same time isnoiseless and prevents jar on the pump in starting and stopping themotor.

The motor and pump described are, in practice, built of comparativelysmall size, the pump being intended primarily for medical or dental useand to either deliver a comparatively small supply of compressed air, orit may be used as a suction device of low capacity. Both the motor andthe pump are so arranged as to be silent in operation and at the sametime are of exceedingly large capacity in proportion to their size. Theopen space around the connection between the pump and motor preventsoverheating of the motor by the pump and permits a free circulation ofair through the motor casing. The construction also furnishes aself-contained device in which a separate support for the pump is notrequired, a common base serving for both the brushes 60 are on theoutside of the casing and the brushes may be readily and easily adjustedto secure the highest efliciency in operation by regulation of the lagof the motor. The leads for the motor and its lubricating cups are allaccessible from the outside of its casing.

What I claim is:

1. A portable combined'motor and pump, comprising a base, a motorsupported on a horizontal axis upon said base and having a shell orhousing, rods detachably secured to and extending horizontally in thedirection of the motor axis from one end of said shell or housing, aself-contained pump supported on the ends of said rods and bodilyremovable therefrom, and a separable connection between the motor shaftand said pump for driving the latter.

2.-A portable combined motor and pump, comprising a base, a motorsupported thereon upon a horizontal axis and having a shell formed withan integral head at one end and a removable head at the other end,hearings in said heads, a rotor for said motor having a horizontal shaftmounted in said bearings, a stator within said casing, a selfcontainedpump secured to and carried by said casing and bodily removabletherefrom,

, and driving connections between said shaft and pump.

3. A portable combined motor and pump,

comprising a base, a motor supported thereon and provided with a shellor casing having an integral head at one end, a stator Within saidcasing, a removable head at the other end of said casing, rods forsecuring said stator to said casing and also supporting said removablehead, a rotor within said casing and supported by said heads and havinga shaft projecting endwise through said fixed head, a pump comprising acasing and a piston therein, said pump casing being spaced from andremovably secured to and carried by said fixed head, and connectionsbetween said shaft and piston for driving the same.

i. A portable combined motor and pump, comprising a base, a motorsupported thereon and having a shell, a fixed head at one end of saidshell and a removable head at the other end thereof, said heads beingprovided with apertures for circulating air through the casing, ofcylindrical form to fit the same, rods for securing said stator and saidremovablehead to said casing, a rotor, bearings in said heads forsupporting the same and a pump removably attached to and spaced from thefixed head of said casing and operatively connected to said rotor.

In testimony whereof I have hereunto set my hand.

JAMES B. VERNON. Witnesses:

H. WV. NESTLE, J. H. KLINE.

a stator Within said shell

